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Total Surface Area of a cube

The TSA of ...

Question

The $T S A$ of cube $= 726 c m^{2}$ find the edge. (in cm)

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Solution

Let the edge of a cube be $a$
Given $T S A$ of a cube is $726 c m^{2}$
$⟹ 6 a^{2} = 726$
$⟹ a^{2} = 121$
$⟹ a = 11$
Edge of cube is $11 c m$

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